<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <!-- 
        id 唯一标识符
        name  
        class
        title  可以在网页中，鼠标移动到该标签内容时，给予提示信息
     -->
</body>
</html>